145331709 has 8 divisors (see below), whose sum is σ = 194790912. Its totient is φ = 96380160.

The previous prime is 145331677. The next prime is 145331717. The reversal of 145331709 is 907133541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145331709 - 2⁵ = 145331677 is a prime.

It is a super-2 number, since 2×145331709² = 42242611281721362, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 145331709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145331729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126244 + ... + 127389.

It is an arithmetic number, because the mean of its divisors is an integer number (24348864).

Almost surely, 2^145331709 is an apocalyptic number.

It is an amenable number.

145331709 is a deficient number, since it is larger than the sum of its proper divisors (49459203).

145331709 is a wasteful number, since it uses less digits than its factorization.

145331709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253827.

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 145331709 is about 12055.3601771162. The cubic root of 145331709 is about 525.7590941918.

The spelling of 145331709 in words is "one hundred forty-five million, three hundred thirty-one thousand, seven hundred nine".